The 90/10 Rule for AI Agents: Buy 90%, Build 10% — But Here's When to Break It

12 Feb 2026 · 63 min
1:02:40

Amelia and Jason Lemkin explain their 90/10 rule: buy 90% of AI tools off-the-shelf, build 10% when nothing exists. They break the rule for niche markets, proprietary data, and inadequate products, walking through two case studies including a custom sponsor portal and an AI marketing assistant that pulls ten years of Salesforce data.

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